CN105474341B - sealing mechanism and key device - Google Patents

Abstract

A kind of sealing mechanism for being useful in a key device, the key device includes a button base (32), and the sealing mechanism (34) includes a front ring housing (44), a lampholder shell (46) and a containment member (48).The front ring housing (44) is mounted on the button base (32), and the lampholder shell (46) is mounted on the front ring housing (44).The containment member (48) includes a seal body (50) and a sealing wall (52), described sealing wall (52) ring is located at the seal body (50), to be fixed on the lampholder shell (46).The lampholder shell (46) pushes the periphery of the seal body (50) respectively when mounted on front ring housing (44) with the front ring housing (44), make the seal body (50) and the front ring housing (44) that a sealing space be collectively formed, one of to seal in the button base (32) the first fluting (321).Key device with the sealing mechanism.The sealing mechanism can effectively blocking foreign body enter inside key device.

Description

Sealing mechanism and key device

technical field

The invention relates to a sealing mechanism and a key device, in particular to a sealing mechanism and a key device capable of forming a sealed space inside the key device.

Background technique

Generally speaking, the two-button device can be applied to the man-machine interface of industrial equipment (such as machine tools), so that users can control the industrial equipment through the two-button device, such as turning on or off the power of the industrial equipment. The double-button device is provided with a sealing gasket to prevent foreign matter (eg water, dust, etc.) However, the known sealing gasket is formed with perforations, which will cause the above sealing gasket to fail to form a sealing space during the sealing process, so that the sealing gasket cannot effectively block foreign matter from entering the interior of the double button device.

Contents of the invention

Therefore, the present invention provides a sealing mechanism and a key device capable of forming a sealed space inside the key device to solve the above problems.

In order to achieve the above object, the present invention discloses a sealing mechanism suitable for a key device, the key device includes a key base, and the sealing mechanism includes a front ring housing, a lamp holder housing and a sealing member. The front ring housing is installed on the key base, and the lamp holder housing is installed on the front ring housing. The sealing member includes a sealing body and a sealing wall, and the sealing wall is ring-set on the sealing body to be fixed on the lamp holder housing. When the lamp holder housing is installed in the front ring housing, the front ring housing and the front ring housing respectively push the periphery of the sealing body, so that the sealing body and the front ring housing jointly form a sealed space , to seal a first slot on the key base; the sealing body has a first surface and a second surface opposite to the first surface, and the first surface and the second surface are respectively A first key cover and a first push rod for abutting against the key device, and the second surface and the front ring housing jointly define the sealed space; the sealing member further includes a first an abutment part is arranged at the place where the sealing body corresponds to the first ejector rod, and the two sides of the first abutment part protrude from the first surface and the second surface for respectively abutting against the The first key cover and the first push rod.

According to one embodiment of the present invention, the present invention further discloses that the thickness of the first contact portion is greater than the thickness of the sealing body.

According to one of the embodiments of the present invention, the present invention further discloses that the sealing space is further used to seal a second slot on the key base, and the first surface and the second surface are further respectively used for abutting against a second key cover and a second push rod of the key device, and the sealing member further includes a second abutting portion, which is arranged at the position of the sealing body corresponding to the second push rod, the Two sides of the second abutting portion protrude from the first surface and the second surface for abutting against the second key cover and the second push rod respectively.

According to one embodiment of the present invention, the present invention further discloses that the sealing body further has an elastic connection portion connecting the first abutting portion and the second abutting portion.

According to one of the embodiments of the present invention, the present invention further discloses that the sealing member further includes a first rib part, which is arranged at the joint between the sealing body and the sealing wall, and the first rib part faces the The lamp holder housing protrudes.

According to one of the embodiments of the present invention, the present invention further discloses that the sealing member further includes a second rib part, which is arranged at the joint between the sealing body and the sealing wall, and the second rib part faces the The front ring housing protrudes.

According to one embodiment of the present invention, the present invention further discloses that the lamp holder housing has a fixed ring structure, and the sealing wall surrounds the fixed ring structure.

According to one of the embodiments of the present invention, the present invention further discloses that the lamp holder housing further has a plurality of hook structures for buckling the front ring housing so that the fixing ring structure presses down on the seal The perimeter of the body is in the front ring housing.

According to one of the embodiments of the present invention, the present invention further discloses a button device, which includes a button base and a sealing mechanism, the button base is formed with a first slot, and the sealing mechanism includes a front ring housing , a lamp holder shell and a sealing member. The front ring housing is installed on the key base, and the lamp holder housing is installed on the front ring housing. The sealing member includes a sealing body and a sealing wall, and the sealing wall is arranged on the sealing body to be fixed on the lamp holder housing, and the lamp holder housing is mounted on the The front ring housing and the front ring housing respectively push the periphery of the sealing body, so that the sealing body and the front ring housing together form a sealed space to seal all the buttons on the key base. The first slot; the button device further includes a first key cover and a first push rod, the first key cover is arranged above the lamp holder housing, and the first push rod is slidably arranged In the first slot and corresponding to the first key cover, the sealing body has a first surface and a second surface opposite to the first surface, the first surface and the second surface are respectively used to abut against the first key cover and the first push rod, and the second surface and the front ring housing jointly define the sealed space; the sealing member further includes: a first an abutment part is arranged at the place where the sealing body corresponds to the first ejector rod, and the two sides of the first abutment part protrude from the first surface and the second surface for respectively abutting against the The first key cover and the first push rod.

To sum up, the sealing mechanism of the present invention uses the front ring housing and the lamp holder housing to respectively squeeze the periphery of the sealing body of the sealing member during assembly, so that the sealing body and the front ring housing together form a sealed space to seal the key The first slot and the second slot on the base. In this way, the sealing member can be used to seal the first slot and the second slot on the key base to prevent foreign matter (such as water, dust, etc.) from entering the key base of the key device, so as to further prevent foreign matter from entering the key damage to the key assembly due to the inside of the base. The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of the appearance of a button device according to an embodiment of the present invention.

FIG. 2 is an exploded schematic diagram of a key device according to an embodiment of the present invention.

FIG. 3 is an exploded schematic view of the key device according to another embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a button device according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a sealing member according to an embodiment of the present invention.

Fig. 6 is a schematic view of another viewing angle of the sealing member according to the embodiment of the present invention.

Wherein, the reference signs are explained as follows:

30 key device

32-key base

321 First slot

323 Second slot

34 Sealing mechanism

36 First key cover

361 First guide post

363 The first sliding hook

365 The first trigger department

38 first ejector

40 Second key cover

401 Second guide post

403 Second sliding hook

405 The second trigger unit

42 Second ejector pin

44 Front ring housing

441 First piercing

443 First card slot

445 Second piercing

447 Second card slot

46 Lamp holder housing

461 Fixed ring structure

463 hook structure

48 sealing member

50 sealed body

501 First Surface

503 Second Surface

505 elastic connection part

52 sealed wall

54 The first rib part

56 The second rib part

58 First contact part

60 second contact part

S sealed space

Detailed ways

The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referring to the directions of the drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention. Please refer to FIG. 1 to FIG. 3 , FIG. 1 is a schematic view of the appearance of a key device 30 according to an embodiment of the present invention, FIG. 2 is an exploded view of a key device 30 according to an embodiment of the present invention, and FIG. Schematic diagram of explosion from perspective. In this embodiment, the button device 30 can be a double-button device, that is to say, the button device 30 can include two buttons, which is applied in the man-machine interface of industrial equipment (such as machine tools). The application of the button device 30 of the present invention is not limited to what is shown in the drawings of this embodiment, for example, the button device 30 can also be a single button device. As for which of the above-mentioned designs is adopted, it depends on actual needs.

As shown in Figures 1 to 3, the key device 30 includes a key base 32, a sealing mechanism 34, a first key cover 36, a first push rod 38, a second key cover 40 and a second push rod 42 . The sealing mechanism 34 includes a front ring housing 44 and a lamp holder housing 46 , and a first slot 321 and a second slot 323 are formed on the key base 32 . Further, the front ring housing 44 is installed on the key base 32, the lamp holder housing 46 is installed on the front ring housing 44, the first key cover 36 is arranged above the lamp holder housing 46, and the first push rod 38 is slidably Set in the first slot 321 on the key base 32 and corresponding to the first key cover 36 , the second key cover 40 is set above the lamp holder housing 46 and adjacent to the first key cover 36 , the second push rod 42 The second slot 323 is slidably disposed on the key base 32 and corresponds to the second key cover 40 .

Please refer to FIG. 2 to FIG. 4 . FIG. 4 is a schematic cross-sectional view of a button device 30 according to an embodiment of the present invention. As shown in FIGS. 2 to 4 , the first key cover 36 includes a first guide column 361 and a first sliding hook 363 , and the front ring housing 44 is formed with a first through hole 441 and a first locking groove 443 , The first through hole 441 corresponds to the first guide post 361 , and the first locking groove 443 corresponds to the first sliding hook 363 . When assembling the first key cover 36 and the front ring housing 44, the first guide post 361 can be slidably inserted in the first through hole 441, so that the first key cover 36 moves up and down relative to the front ring housing 44 , and the first sliding hook 363 is slidably disposed in the first slot 443 to prevent the first key cover 36 from detaching from the front ring housing 44 . The number and positions of the first guide posts 361 , the first sliding hooks 363 , the first through holes 441 , and the first slots 443 of the present invention are not limited to those shown in the drawings of this embodiment, but depend on actual needs.

In addition, the second key cover 40 includes a second guide post 401 and two second sliding hooks 403. The front ring housing 44 is formed with a second through hole 445 and two second slots 447. The second through hole 445 corresponds to the second The guide post 401 and the second slot 447 correspond to the second sliding hook 403 . When assembling the second key cover 40 and the front ring housing 44, the second guide post 401 can be slidably inserted in the second through hole 445, so that the second key cover 40 moves up and down relative to the front ring housing 44 , and the two second sliding hooks 403 are respectively slidably disposed in the two second locking grooves 447 to prevent the second key cover 40 from detaching from the front ring housing 44 . The number and positions of the second guide post 401 , the second sliding hook 403 , the second through hole 445 and the second locking groove 447 of the present invention are not limited to those shown in the drawings of this embodiment, but depend on actual needs.

As shown in FIGS. 2 to 4 , the sealing mechanism 34 further includes a sealing member 48 disposed between the front ring housing 44 and the lamp holder housing 46 , the sealing member 48 includes a sealing body 50 and a sealing wall 52 , The sealing wall 52 is arranged around the sealing body 50 . In practice, the sealing wall 52 can be fixed on the lamp holder housing 46 , so that the sealing member 48 can be pre-fixed on the lamp holder housing 46 for subsequent assembly. In this embodiment, the lamp socket housing 46 can have a fixing ring structure 461 . When assembling the sealing member 48 and the lamp holder housing 46 , the sealing wall 52 of the sealing member 48 can surround the fixing ring structure 461 of the lamp holder housing 46 to fix the sealing member 48 on the lamp holder housing 46 . The structural design of the sealing member 48 to be fixed on the lamp socket housing 46 is not limited to that shown in the drawings of this embodiment, and it depends on actual requirements. In this embodiment, the sealing member 48 can be made of thermoplastic polyurethane (THERMOPLASTIC URETHANE, TPU), which has high oil resistance and is not easy to change color after being irradiated by ultraviolet rays, but the invention is not limited thereto.

Please refer to FIG. 4 to FIG. 6 , FIG. 5 is a schematic diagram of the sealing member 48 according to the embodiment of the present invention, and FIG. 6 is a schematic diagram of the sealing member 48 according to the embodiment of the present invention from another perspective. As shown in FIGS. 4 to 6 , the lamp holder housing 46 can further have a plurality of hook structures 463 , and the sealing body 50 has a first surface 501 and a second surface 503 opposite to the first surface 501 . In addition, the sealing member 48 further includes a first rib portion 54 and a second rib portion 56 , the first rib portion 54 is disposed at the joint between the sealing body 50 and the sealing wall 52 and protrudes toward the lamp socket housing 46 . , the second rib portion 56 is disposed at the junction of the sealing body 50 and the sealing wall 52 and protrudes toward the front ring housing 44 .

After the sealing member 48 is fixed on the lamp holder housing 46, the lamp holder housing 46 can be further assembled on the front ring housing 44. At this time, the hook structure 463 of the lamp holder housing 46 can be used to buckle the front ring housing 44 such that the fixing ring structure 461 of the lamp base housing 46 presses down the periphery of the sealing body 50 of the sealing member 48 on the front ring housing 44 . In other words, when the lamp holder housing 46 is installed on the front ring housing 44, the lamp holder housing 46 and the front ring housing 44 can be pushed respectively through the buckling action of the hook structure 463 and the front ring housing 44. Squeeze the periphery of the sealing body 50 of the sealing member 48. At this time, the sealing body 50 of the sealing member 48 and the front ring housing 44 can jointly form a sealing space S to seal the first slot 321 on the key base 32. with the second slot 323 .

In this way, the sealing member 48 can be used to seal the first slot 321 and the second slot 323 on the key base 32, so as to prevent foreign matter (such as water, dust, etc.) from entering the key base 32 of the key device 30, In order to further prevent foreign matters from entering the interior of the key base 32 and causing damage to the key assembly. As shown in FIG. 4 , when the sealing body 50 and the front ring housing 44 jointly form the sealing space S, the first surface 501 and the second surface 503 of the sealing body 50 are used to abut against the first key cover 36 and the first top respectively. The rod 38 ; the first surface 501 and the second surface 503 of the sealing body 50 are respectively used to abut against the second key cover 40 and the second push rod 42 .

That is to say, the first key cover 36 and the first push rod 38 respectively abut against the first surface 501 and the second surface 503 of the sealing body 50 without contacting each other, and the second key cover 40 and the second push rod 42 respectively The first surface 501 and the second surface 503 abutting on the sealing body 50 do not contact each other, so there is no need to set holes on the sealing body 50 for the first key cover 36 and the first push rod 38 to pass through and for the second key cover 40 and the second key cover 40 to pass through. The second push rod 42 passes through, so that the above design can further improve the sealing effect of the sealing member 48 . In addition, the second surface 503 of the sealing body 50 can jointly define the sealing space S with the front ring housing 44. Since the second surface 503 is a complete surface, the second surface 503 can define a complete seal with the front ring housing 44. The space S further improves the sealing effect of the sealing member 48 .

In addition, when the lamp holder housing 46 and the front ring housing 44 respectively push against the periphery of the sealing body 50 of the sealing member 48, the first rib portion 54 and the second rib portion 56 of the sealing member 48 can respectively It is deformed by being squeezed by the lamp holder housing 46 and the front ring housing 44 , and then flatly attached to the lamp holder housing 46 and the front ring housing 44 . That is to say, when the lamp holder housing 46 and the front ring housing 44 respectively push against the periphery of the sealing body 50 of the sealing member 48, the first rib portion 54 and the second rib portion 56 of the sealing member 48 can be pressed by the lamp. The seat housing 46 and the front ring housing 44 are pressed and flatly attached to the lamp base housing 46 and the front ring housing 44 to further improve the sealing effect of the sealing member 48 .

As shown in FIGS. 4 to 6 , the sealing member 48 further includes a first contact portion 58 , and the first key cover 36 has a first trigger portion 365 . The first abutting portion 58 is disposed on the sealing body 50 corresponding to the first push rod 38 , and two sides of the first abutting portion 58 protrude from the first surface 501 and the second surface 503 of the sealing body 50 . When the user presses the first key cover 36 , the two sides of the first abutting portion 58 can respectively abut against the first trigger portion 365 and the first push rod 38 of the first key cover 36 , so that the first key cover 36 The first triggering portion 365 drives the first push rod 38 through the first abutting portion 58 to trigger a switch (not shown in the figure) in the key base 32 .

It is worth mentioning that since both sides of the first abutting portion 58 protrude from the first surface 501 and the second surface 503 of the sealing body 50 , that is, the thickness of the first abutting portion 58 is greater than the thickness of the sealing body 50 , so the second An abutting portion 58 has greater mechanical strength than the sealing body 50 itself, so as to prevent the sealing member 48 from being damaged when the first key cover 36 and the first push rod 38 are actuated. That is to say, the structural design of the first abutting portion 58 having a larger thickness in the present invention can be used to increase the service life of the sealing member 48 . In this embodiment, the first abutting portion 58 can be a platform structure, but the invention is not limited thereto.

In addition, since the first abutting portion 58 of the sealing member 48 is clamped by the first trigger portion 365 of the first key cover 36 and the first push rod 38 , the first trigger portion 365 of the first key cover 36 penetrates When the first abutting portion 58 drives the first push rod 38 to trigger the switch in the key base 32 , the distance between the first abutting portion 58 and the first trigger portion 365 and between the first abutting portion 58 and the first push rod 38 The relative movement amount is small, so the structural design of the first abutting portion 58 of the present invention can reduce the friction between the first abutting portion 58 and the first trigger portion 365 and between the first abutting portion 58 and the first push rod 38, and further further The service life of the sealing member 48 is increased. After actual testing, the sealing member 48 of the present invention can withstand more than 5 million presses by the first key cover 36 .

In addition, the sealing member 48 further includes a second contact portion 60 , and the second key cover 40 has a second trigger portion 405 . The second abutting portion 60 is disposed on the sealing body 50 corresponding to the second push rod 42 , and two sides of the second abutting portion 60 protrude from the first surface 501 and the second surface 503 of the sealing body 50 . When the user presses the second key cover 40 , the two sides of the second abutting portion 60 can respectively abut against the second trigger portion 405 and the second push rod 42 of the second key cover 40 , so that the second key cover 40 The second triggering portion 405 drives the second plunger 42 through the second abutting portion 60 to trigger a switch (not shown in the figure) in the key base 32 .

It is worth mentioning that since both sides of the second abutting portion 60 protrude from the first surface 501 and the second surface 503 of the sealing body 50 , that is, the thickness of the second abutting portion 60 is greater than the thickness of the sealing body 50 , so the second abutting portion 60 The two abutting portions 60 have greater mechanical strength than the sealing body 50 itself, so as to prevent the sealing member 48 from being damaged when the second key cover 40 and the second push rod 42 are actuated. That is to say, the structural design of the second abutting portion 60 having a larger thickness in the present invention can be used to increase the service life of the sealing member 48 . In this embodiment, the second abutting portion 60 can be a platform structure, but the invention is not limited thereto.

In addition, since the second abutting portion 60 of the sealing member 48 is clamped by the second trigger portion 405 of the second key cover 40 and the second push rod 42 , the second trigger portion 405 of the second key cover 40 penetrates When the second abutting portion 60 drives the second push rod 42 to trigger the switch in the key base 32 , the distance between the second abutting portion 60 and the second trigger portion 405 and between the second abutting portion 60 and the second push rod 42 The relative movement amount is small, so the structural design of the second abutment portion 60 of the present invention can reduce the friction between the second abutment portion 60 and the second trigger portion 405 and the second abutment portion 60 and the second push rod 42, and further further The service life of the sealing member 48 is increased. After actual testing, the sealing member 48 of the present invention can withstand more than 5 million presses by the second key cover 40 .

In addition, the sealing body 50 of the sealing member 48 further has an elastic connecting portion 505 connecting the first abutting portion 58 and the second abutting portion 60 , which can be used to provide elasticity to make the first abutting portion 58 and the second abutting portion 505 Part 60 moves up and down. In this embodiment, the cross section of the elastic connecting portion 505 may be a U-shaped structure, but the structural design of the elastic connecting portion 505 of the present invention is not limited to that shown in the accompanying drawings of this embodiment.

Compared with the prior art, the sealing mechanism of the present invention utilizes the periphery of the sealing body of the sealing member to be squeezed separately when the front ring housing and the lamp holder housing are assembled, so that the sealing body and the front ring housing jointly form a sealed space, so as to The first slot and the second slot on the key base are sealed. In this way, the sealing member can be used to seal the first slot and the second slot on the key base to prevent foreign matter (such as water, dust, etc.) from entering the key base of the key device, so as to further prevent foreign matter from entering the key damage to the key assembly due to the inside of the base.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (16)

1. A sealing mechanism applicable to a button device, said button device comprising a button base, characterized in that said sealing mechanism comprises: a front ring housing mounted on the key base; a lamp holder housing mounted on said front ring housing; and A sealing member, comprising: a sealed body; and A sealing wall, the ring is set on the sealing body to be fixed on the lamp holder housing, and the lamp holder housing is pushed separately from the front ring housing when installed in the front ring housing. Squeeze the periphery of the sealing body so that the sealing body and the front ring housing jointly form a sealing space to seal a first slot on the key base; The sealing body has a first surface and a second surface opposite to the first surface, and the first surface and the second surface are respectively used to abut against a first key cover and a key cover of the key device. a first push rod, and the second surface and the front ring housing jointly define the sealed space; The sealing member further includes: A first abutting portion is arranged at the place where the sealing body corresponds to the first ejector rod, and the two sides of the first abutting portion protrude from the first surface and the second surface for respectively abutting Connect the first key cover and the first push rod. 2. The sealing mechanism according to claim 1, wherein the thickness of the first abutting portion is greater than the thickness of the sealing body. 3. The sealing mechanism according to claim 2, wherein the sealing space is further used to seal a second slot on the key base, and the first surface and the second surface are further Respectively used to abut against a second key cover and a second push rod of the key device, and the sealing member further includes: A second abutting portion is arranged at the place where the sealing body corresponds to the second ejector rod, and the two sides of the second abutting portion protrude from the first surface and the second surface for respectively abutting Connect the second key cover and the second push rod. 4. The sealing mechanism according to claim 3, wherein the sealing body further has an elastic connecting portion connecting the first abutting portion and the second abutting portion. 5. The sealing mechanism of claim 1, wherein the sealing member further comprises: A first rib part is arranged at the junction of the sealing body and the sealing wall, and the first rib part protrudes toward the lamp holder housing. 6. The sealing mechanism of claim 5, wherein the sealing member further comprises: A second rib part is arranged at the junction of the sealing body and the sealing wall, and the second rib part protrudes toward the front ring housing. 7. The sealing mechanism according to claim 1, wherein the lamp holder housing has a fixed ring structure, and the sealing wall surrounds the fixed ring structure. 8. The sealing mechanism according to claim 7, wherein the lamp holder housing further has a plurality of hook structures for buckling the front ring housing so that the fixing ring structure is pressed down The perimeter of the seal body is at the front ring housing. 9. A button device, comprising: a key base formed with a first slot; and A sealing mechanism, characterized in that the sealing mechanism includes: a front ring housing mounted on the key base; a lamp holder housing mounted on said front ring housing; and A sealing member, comprising: a sealed body; and A sealing wall, the ring is set on the sealing body to be fixed on the lamp holder housing, and the lamp holder housing is pushed separately from the front ring housing when installed in the front ring housing. Squeeze the periphery of the sealing body so that the sealing body and the front ring housing jointly form a sealing space to seal the first slot on the key base; The button device further includes a first key cover and a first push rod, the first key cover is disposed above the lamp holder housing, and the first push rod is slidably disposed on the first opening. In the groove and corresponding to the first key cover, the sealing body has a first surface and a second surface opposite to the first surface, the first surface and the second surface are respectively used to abut against the The first key cover and the first push rod, and the second surface and the front ring housing jointly define the sealed space; The sealing member further includes: A first abutting portion is arranged at the place where the sealing body corresponds to the first ejector rod, and the two sides of the first abutting portion protrude from the first surface and the second surface for respectively abutting Connect the first key cover and the first push rod. 10. The key device according to claim 9, wherein the thickness of the first abutting portion is greater than the thickness of the sealing body. 11. The key device according to claim 10, wherein the key base is further formed with a second slot, and the sealing space is further used to seal the second slot on the key base , the key device further includes a second key cover and a second push rod, the second key cover is arranged above the lamp holder housing and adjacent to the first key cover, the second top The rod is slidably disposed in the second slot and corresponds to the second key cover, and the first surface and the second surface are respectively used to abut the second key cover and the second key cover. The ejector rod, and the sealing member further includes: A second abutting portion is arranged at the place where the sealing body corresponds to the second ejector rod, and the two sides of the second abutting portion protrude from the first surface and the second surface for respectively abutting Connect the second key cover and the second push rod. 12 . The key device according to claim 11 , wherein the sealing body further has an elastic connecting portion connecting the first abutting portion and the second abutting portion. 13 . 13. The key device according to claim 9, wherein the sealing member further comprises: A first rib part is arranged at the junction of the sealing body and the sealing wall, and the first rib part protrudes toward the lamp holder housing. 14. The key device according to claim 13, wherein the sealing member further comprises: A second rib part is arranged at the junction of the sealing body and the sealing wall, and the second rib part protrudes toward the front ring housing. 15. The key device according to claim 9, wherein the lamp holder housing has a fixed ring structure, and the sealing wall surrounds the fixed ring structure. 16. The button device according to claim 15, wherein the lamp holder housing further has a plurality of hook structures for buckling the front ring housing so that the fixing ring structure is pressed down The perimeter of the seal body is at the front ring housing.